Let the conspiracy theories begin. A private investigator has surveillance video, which he believes proves Whitney Houston was murdered, according to The National Enquirer. Paul Huebl suggests that Houston was killed by thugs who had been sent to collect a $1.5 million drug debt. Huebl also says that Houston’s body showed “classic defense wounds that would have occurred while she was battling for her life.” He has reportedly turned over the evidence to the FBI. Huebl’s theory contradicts that of the medical examiner who ruled that Houston’s death was “accidental” after she took cocaine, marijuana, and prescription drugs and then drowned.